I have the same problem myself.
After trying numerous things I've found that the Evoluent vertical Mouse 2 works, as the hand is at a completly different angle than a normal mouse, trackball or touchpad. I also use a Futuro RSI wrist strap which limits the movement in the wrist and forces me to keep it at the correct angle etc for the keyboard.
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I have the same problem myself. After trying numerous things I've found that the Evoluent vertical Mouse 2 works, as the hand is at a completly different angle than a normal mouse, trackball or touchpad. I also use a Futuro RSI wrist strap which limits the movement in the wrist and forces me to keep it at the correct angle etc for the keyboard.